Version:           3.5.0.1 (using KDE KDE 3.5.8)
Installed from:    Ubuntu Packages

When I added a watch(which might be not evaluatable, but I did have a try), it crashed.

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1243171136 (LWP 5092)]
[New Thread -1272194160 (LWP 5129)]
[New Thread -1257845872 (LWP 5120)]
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[KCrash handler]
#6  0xb45d8517 in GDBDebugger::VarItem::handleSpecialTypes ()
   from /usr/lib/kde3/libkdevdebugger.so
#7  0xb45d8dc3 in GDBDebugger::VarItem::updateValue ()
   from /usr/lib/kde3/libkdevdebugger.so
#8  0xb45db6fe in GDBDebugger::VariableTree::handleVarUpdate ()
   from /usr/lib/kde3/libkdevdebugger.so
#9  0xb45c6e8f in GDBDebugger::GDBCommand::invokeHandler ()
   from /usr/lib/kde3/libkdevdebugger.so
#10 0xb45c3cc5 in GDBDebugger::GDBController::processMICommandResponse ()
   from /usr/lib/kde3/libkdevdebugger.so
#11 0xb45c4209 in GDBDebugger::GDBController::slotDbgStdout ()
   from /usr/lib/kde3/libkdevdebugger.so
#12 0xb45be863 in GDBDebugger::GDBController::qt_invoke ()
   from /usr/lib/kde3/libkdevdebugger.so
#13 0xb6717893 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#14 0xb6da1643 in KProcess::receivedStdout () from /usr/lib/libkdecore.so.4
#15 0xb6da1748 in KProcess::childOutput () from /usr/lib/libkdecore.so.4
#16 0xb6da1779 in KProcess::slotChildOutput () from /usr/lib/libkdecore.so.4
#17 0xb6da17da in KProcess::qt_invoke () from /usr/lib/libkdecore.so.4
#18 0xb6717893 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#19 0xb67181aa in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#20 0xb6aa4683 in QSocketNotifier::activated () from /usr/lib/libqt-mt.so.3
#21 0xb673a46e in QSocketNotifier::event () from /usr/lib/libqt-mt.so.3
#22 0xb66aeaf0 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#23 0xb66b091f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#24 0xb6e75ca2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#25 0xb6641209 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#26 0xb66a0ee9 in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/libqt-mt.so.3
#27 0xb6655d2b in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#28 0xb66c91ce in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#29 0xb66c8fde in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#30 0xb66b0699 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#31 0x0804e6c4 in ?? ()
#32 0xbfd3c628 in ?? ()
#33 0x08099418 in ?? ()
#34 0xbfd3c608 in ?? ()
#35 0x00000001 in ?? ()
#36 0x08052e17 in ?? ()
#37 0x00000001 in ?? ()
#38 0x08052f04 in ?? ()
#39 0x08052ebb in ?? ()
#40 0x0805267c in ?? ()
#41 0x08052668 in _IO_stdin_used ()
#42 0xb5ea0c4c in ?? () from /lib/tls/i686/cmov/libc.so.6
#43 0xb5e9f608 in ?? () from /lib/tls/i686/cmov/libc.so.6
#44 0x00000002 in ?? ()
#45 0x08063ed8 in ?? ()
#46 0x080526a5 in ?? ()
#47 0x0805269c in ?? ()
#48 0x08052694 in ?? ()
#49 0x080534a0 in typeinfo for QGList ()
#50 0x00000001 in ?? ()
#51 0x08052f04 in ?? ()
#52 0x08052ebb in ?? ()
#53 0x0805267c in ?? ()
#54 0x08052668 in _IO_stdin_used ()
#55 0x080627e8 in ?? ()
#56 0x08062818 in ?? ()
#57 0x00000000 in ?? ()